# US 12,191,446 B2 · Binder composition for all-solid-state secondary battery > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,191,446 B2 - Document ID: US12191446B2 - Status: Granted - Kind: B2 - Application number: 17/413,949 - Filed: 2019-12-05 - Published: 2022-02-10 - Granted: 2025-01-07 - Earliest claimed: 2018-12-28 - Assignees: Zeon Corporation - Applicants: Zeon Corporation - Inventors: Yusaku Matsuo; Kenya Sonobe - Web page: https://patentgrep.com/patent/US12191446B2 ## CPC - C08L 33/20: Homopolymers or copolymers of acrylonitrile (C08L55/02 takes precedence) - H01M 10/0565: Polymeric materials, e.g. gel-type or solid-type - C08F 220/1804: {C4-(meth)acrylate, e.g. butyl (meth)acrylate, isobutyl (meth)acrylate or tert-butyl (meth)acrylate} - C08K 5/13: Phenols; Phenolates - C08K 5/134: Phenols containing ester groups - C08K 5/1345: {Carboxylic esters of phenolcarboxylic acids} - C08K 5/375: containing six-membered aromatic rings {(C08K5/3725 takes precedence)} - C08K 5/378: containing heterocyclic rings - C08K 5/527: Cyclic esters - C08L 33/08: Homopolymers or copolymers of acrylic acid esters - H01M 4/62: Selection of inactive substances as ingredients for active masses, e.g. binders, fillers - H01M 4/622: {being polymers} - H01M 10/0562: Solid materials - H01M 2300/0065: Solid electrolytes - H01M 2300/0082: Organic polymers - Y02E 60/10: Energy storage using batteries - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS - C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09) - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract Provided is a binder composition for an all-solid-state secondary battery that can yield an all-solid-state secondary battery having excellent output characteristics and high-temperature cycle characteristics. The binder composition for an all-solid-state secondary battery contains a polymer, an anti-aging agent, and an organic solvent. The polymer includes a (meth)acrylic acid ester monomer unit in a proportion of not less than 25 mass % and not more than 95 mass % and has a gel content of 50 mass % or less. The anti-aging agent is contained in an amount of not less than 0.005 parts by mass and not more than 0.5 parts by mass per 100 parts by mass of the polymer. ## Claims ### Claim 1 A binder composition for an all-solid-state secondary battery comprising a polymer, an anti-aging agent, and an organic solvent, wherein the polymer includes a (meth)acrylic acid ester monomer unit in a proportion of not less than 25 mass % and not more than 95 mass % and a hydrophobic monomer unit in a proportion of not less than 3 mass % and not more than 15 mass %, and has a gel content of 50 mass % or less, and the anti-aging agent is contained in an amount of not less than 0.005 parts by mass and not more than 0.5 parts by mass per 100 parts by mass of the polymer. ### Claim 2 (depends on 1) The binder composition for an all-solid-state secondary battery according to claim 1, wherein the polymer further includes an «,β-unsaturated nitrile monomer unit. ### Claim 3 (depends on 2) The binder composition for an all-solid-state secondary battery according to claim 2, wherein the «,β-unsaturated nitrile monomer unit constitutes a proportion of not less than 2 mass % and not more than 30 mass % in the polymer. ### Claim 4 (depends on 3) The binder composition for an all-solid-state secondary battery according to claim 3, the ═,β-unsaturated nitrile monomer unit constitutes a proportion of not less than 15 mass % and not more than 30 mass % in the polymer. ### Claim 5 (depends on 1) The binder composition for an all-solid-state secondary battery according to claim 1, wherein the anti-aging agent is at least one selected from the group consisting of a phenolic anti-aging agent and an organophosphorus anti-aging agent. ### Claim 6 (depends on 1) A slurry composition for an all-solid-state secondary battery solid electrolyte layer comprising: the binder composition for an all-solid-state secondary battery according to claim 1; and a solid electrolyte. ### Claim 7 (depends on 1) A slurry composition for an all-solid-state secondary battery electrode comprising: the binder composition for an all-solid-state secondary battery according to claim 1; a solid electrolyte; and an electrode active material. ### Claim 8 (depends on 7) An electrode for an all-solid-state secondary battery comprising an electrode mixed material layer formed using the slurry composition for an all-solid-state secondary battery electrode according to claim 7. ### Claim 9 (depends on 1) The binder composition for an all-solid-state secondary battery according to claim 1, wherein the organic solvent is one or more selected from the group consisting of an aromatic hydrocarbon, an ether, and an ester. ### Claim 10 A solid electrolyte layer for an all-solid-state secondary battery formed using a slurry composition for an all-solid-state secondary battery solid electrolyte layer comprising a binder composition for an all-solid-state secondary battery; and a solid electrolyte, wherein the binder composition for an all-solid-state secondary battery comprises a polymer, an anti-aging agent, and an organic solvent, wherein the polymer includes a (meth)acrylic acid ester monomer unit in a proportion of not less than 25 mass % and not more than 95 mass % and a hydrophobic monomer unit, and has a gel content of 50 mass % or less, and wherein the anti-aging agent is contained in an amount of not less than 0.005 parts by mass and not more than 0.5 parts by mass per 100 parts by mass of the polymer. ### Claim 11 (depends on 10) An all-solid-state secondary battery comprising: the solid electrolyte layer for an all-solid-state secondary battery according to claim 10. ### Claim 12 (depends on 10) The solid electrolyte layer for an all-solid-state secondary battery according to claim 10, wherein the organic solvent is one or more selected from the group consisting of an aromatic hydrocarbon, an ether, and an ester.